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RESET MASTER;
connect pause_purge,localhost,root;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
CREATE TABLE t (pk int PRIMARY KEY, sk INT UNIQUE) ENGINE=InnoDB;
INSERT INTO t VALUES (10, 100);
connect con1,localhost,root;
BEGIN;
SELECT * FROM t WHERE sk = 100 FOR UPDATE;
pk sk
10 100
connect con2,localhost,root;
SET DEBUG_SYNC="lock_wait_start SIGNAL insert_wait_started";
INSERT INTO t VALUES (5, 100) # trx 1;
connect con3,localhost,root;
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET DEBUG_SYNC="now WAIT_FOR insert_wait_started";
SET DEBUG_SYNC="lock_wait_start SIGNAL delete_started_waiting";
BEGIN;
UPDATE t SET sk = 200 WHERE sk = 100; # trx 2;
connection con1;
SET DEBUG_SYNC="now WAIT_FOR delete_started_waiting";
DELETE FROM t WHERE sk=100;
COMMIT;
disconnect con1;
connection con2;
disconnect con2;
connection con3;
must be logged in ROW format as the only event of trx 2 (con3)
INSERT INTO t VALUES (11, 101);
COMMIT;
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Query # # use `test`; DELETE FROM t WHERE sk=100
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Query # # use `test`; INSERT INTO t VALUES (5, 100) # trx 1
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Annotate_rows # # INSERT INTO t VALUES (11, 101)
master-bin.000001 # Table_map # # table_id: # (test.t)
master-bin.000001 # Write_rows_v1 # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
disconnect con3;
connection default;
SELECT * FROM t;
pk sk
5 100
11 101
disconnect pause_purge;
SET DEBUG_SYNC="RESET";
DROP TABLE t;
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